Pump.



E. E. IZER.

PUMP.

APPLICATION FILED AUG. 19. 1914.

1,154,316. Patented Sept. 21, 1915. I 1 15 COLUMBIA PLANOBRAPH co., WASHINGTON, D. c.

ELMER E. IZER, OF POMONA, (.JALI'FORNIA, ASSIGNOR TO POMONA MANUFACTURING COMPANY, OF POMONA, CALIFORNIA, A CORPORATION OF CALIFORNIA.

PUMP.

Specification of Letters Patent.

Patented Sept. 21, 1915.

Application filed August 19. 1914. Serial No. 857,602.

To all whom it may concern:

Be it known that I, ELMER E. IznR, a citizen of the United States, residing at P0- mona, county of Los Angeles, and State of California, have invented certain new and useful Improvements in Pumps, of which the following is a specification.

My invention relates to pumps and more particularly to piston pumps, and the object of the invention is to provide means in such pumps whereby large volumes of fluid may be efiiciently lifted through considerable distances without the necessity for frequent shutdowns for adjustments and replacements. Such shutdowns are objectionable in all sorts of pumping and particularly so when used to supply water for domestic purposes. This object is accomplished by a new and useful formof packing retainer and anew and useful valve structure, the valves and packing being the vulnerable points in any pump, and any material improvement therein serving to accomplish the above defined object. I g

The new form of: valv: structure comprised in my invention provides afvalve that is naturally self centering and in which the wear on the seats may be considerable without disturbing this self centering feature. It further provides a structure havi ng large, straight openings through whichv the fluid passes at a low velocity and with a minimum of deflection. This gives a long lived valve as the wear on such a structure is increased if the fluid has to materiallychange its direction or if the fluid has to pass through restricted openings at high velocities.

Thenew form of packing retainer comprised in my invention provides means for independently, positively, and securely'gripping each of a plurality of packing members so that the load on each member is independently transmitted to the supporting bucket and so that a partial failure of any one of the packing members will not affect the remainder.

A further object of my invention is to make-the parts most subject to wear of such a form that they can be readily and cheaply replaced.

I Further objects and advantages will be defined hereinafter.

Certain parts of a vertical duplex water pump have been selected as a convenient emthe arrows. Fig. 3 is a section on the plane m m of Fig. 1 lookingin the direction of the arrows. Fig. 4: is an enlarged vertical axial section of a portion of the packing and its supporting structure. Fig. 5 is an enlarged section of one form of clapper and a portlon of'its seat. Fig. 6 is a similar view of an alternative form of clapper.

In this embodiment of myinvention an upper bucket 10 and a lower bucket 11 move vertically in a'pump barrel 12, the lower bucket 11 being rigidly connected to an inside rod 13 which passes through the bucket 10, and the upper bucket 10 being rigidly connected to an outside rod 14 which surrounds the rod 13, the rods 13 and 14 eX- tending upwardly to a suitable pumping head forming no part of this invention and therefore not shown.

The lower bucket 11 conslsts of body member 15 comprising an outer shell 16 and an'inner hub 17, the shell and hub being con nected by suitable ribs 18 openings 19being formed therebetween and extending completely through the body member 15. A valve seat 20 is formed on thetop of the hub 17 and a valve seat 21 is formed on the top of the shell 1.6. A short rod 22 is screwed and pinned in the hub 17 and is connected to the rod 13 by means of a head 23. A clapper 24 is machined to form a tight closure when resting on the seats 20 and 21 and has a hub 26 sliding on the rod 22, the head 23'limiting its upward travel and the seats 20 and 21 its lower travel.

The outer shell 16 is eXt'eriorly threaded and has a. shoulder 27 formed on its upper end, A series of packing members 28 preferably formed of leather and consisting of a disk shaped portion 29 joined with a cylindrical portion 30, have an inner diameter slightly larger than the outside of the shell 16 over which they slip. A series of rings 31 are threaded to fit the threadson'the shell 16 and have a series of concentric projections 32 formed on their upper and lower it'aces,;these projections being solocatedthat those on one-ringwould fit into the depressions between the projections on the next one if they were screwed together. A series of holes33 are formed on the periphery of the freely through a tube 34 and is secured the-rein, this tube being connected through an upperhead35 to the rod 1 4. A clapper 36 slides on the tube 34, the seats thereon and the bucket structure, including the packing members, being, similarit'o that already described in connection with the bucket 11 The method" of operation of the invention when applied tea duplex pumpisself evident. The buckets 10 and: 11-, being alter nately actuated first one bucket and then the other takes-the Weight ofthe water the clappers-g t and 36 rising-and falling as the load-shifts. I I w Thenovelty and utility of the valve structureis diagrammatically illustrated by Figs. 5 and 6; In Fig. 5 the partsare numbered as in Fig. 1. It will be noted that-thesection of valve, seats 20 and 21 are straight lines a*ct and 6-4) theline b-bi intersecting the axis mm at d, these lines a-gaand:

b-J)? representing the projections of cones having their apexes-on the axis Per pendicularsxerected at the center qof the seats 20 21011 the points 6 and f intersect at the point 0 on the axis 'If a. spherebegenerated about the point 0 with a radius 0-6 the cones in which the valve seats- 20- and 21-lie will be tangent thereto along circles-described about the axis As the radial lengths of the SGEtlISQOflHd- 2 1 are small the approximation to a spherical seat is close especially after the valves have Worn slightly, but the difficulty of machining such-conicalseats is considerably less than ,that met with inmachining true spherical ones.- A v, The construction as illustrated; in Fig; 5 is adoptedwhere the diameterof ther pump barrel is large. VV-he're small pump barrels are" used the construction shown in Fig. 6 is adopted inwhich seats 200 and 210 are tangent to concentric spheres formed with radii R and 0" which have a common center 79,. Sucha valve permits ofja largeopen ing and substantial seats andl have used it with good success Where space COIldltlOIl'S made 1t necessary.

' Wear a-t these points.

slides on a; short: tube 34 Which may be re- 3 placed Without replacing the rods 13 and 14, an important feature as the movement of the clappers' 24 and 36 causes considerable It will further be noted that each of the packing members 28 is individuallys'ecured between two of the rings 31 and the destruction or loss of any packing member in no-Way afliects the security. of adjacent packing members, the forces acting on each packing member-28 being directlytransmitted to the shell-'16 withoutregard to the other packing members 28. This is a. much superior construction to. those now in mmon use in which the, rings would: slide freely on the shell 16' beingv all clamped" in place by a single nut or bysuitable bolts and in which the tearin-g'out: of a single 'packingflmember loosensall the others. r

.I claim'as my invention: 7 p I I 11,,In ax pump, a valye supporting meinher having" an inherited an'outerseat formed thereon, and a clapper adapted to make a tightclos u're, with. saidseats, said seats belng frustorconicalin shape the generating conesthereof being" tangent to spheres having. the samelcenter.

havingan inner and an outer se'at' formed thereon, and' a clapper adapted to make a tight closure with said seats, said se'ats being frusto-conical in shape the apex of each enemungicoue coin iding with the" axisTot thevalvebelowthe'seat; v i

3.- In 'apump, a buckethaving' inner and outer seat formed thereo'n having a a. fluid passage" extending"tlierethroughbetween sa1;dseats, a rod secured in said ,bucket,avalve slidably' mounted on said rod'and'so shaped as to makea tight closure" ,7

with said seats, said siea'tsbeing frusto-conical inv shape each of the generating cones thereof having its apex located on the axis of saidbucketan'd below the'seat;

4. In. a'pump,,.a plurality ofbucketsmovable along a single" axis each bucket having an inner andan outer seat-formed thereon and;v a fluid'passage extendingthrough the'bucket betweeflxthe seats, a rod 01.- each bucket c said rods consisting 'of concentric tubes'jeachr secured rigidly inits bucket, and a clapper for each. bucket, sliding on the rodof that bucket and adapted to make a tighit closure with the seats'of that bucket, the seats of each clapper being? tangent to spheres havinga common center located in} the said axis.

5. In a pump, a plurality'ofbucketslmoy able; along a single axis each bucke't having an inner and an outer seat; formedthereon and a fluid. passage extending throughthe bucket between the'seats,,-a' rod for each'piston, said'rodscons'isting of concentric tubes V 95' v 2;" In apilmp, 'aovalvesupp'orting member I each secured rigidly in its bucket, and a clapper for each bucket sliding on the rod of that bucket and adapted to make a tight closure With the seat of that bucket, the seats of each clapper being frusto-conical and tangent to spheres having a common center located in said axis.

In testimony whereof, I have hereunto set my hand at Pomona, California, this 14th day of Aug, 1914.

ELMER E. IZER. In the presence of- F. H. MoRRIs, J. F. RAMBO.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. O. 

